ipc: apr: add qcom,subsys-name for apr

Add qcom,subsys-name for apr driver. Based on the property,
registration of notifier is done for the right co-processor,
from which notification needs to be received.

Change-Id: Id492c8b24d1a4cf0bcab37700a1e9c61c9067041
Signed-off-by: Meng Wang <mengw@codeaurora.org>

ipc/apr.c

@@ -43,6 +43,7 @@ static struct apr_client client[APR_DEST_MAX][APR_CLIENT_MAX];
 static void *apr_pkt_ctx;
 static wait_queue_head_t modem_wait;
 static bool is_modem_up;
+static char *subsys_name = NULL;
 /* Subsystem restart: QDSP6 data, functions */
 static struct workqueue_struct *apr_reset_workqueue;
 static void apr_reset_deregister(struct work_struct *work);
@@ -1108,8 +1109,7 @@ static void apr_cleanup(void)
 	int i, j, k;
 
 	of_platform_depopulate(apr_priv->dev);
-	subsys_notif_deregister("apr_modem");
-	subsys_notif_deregister("apr_adsp");
+	subsys_notif_deregister(subsys_name);
 	if (apr_reset_workqueue) {
 		flush_workqueue(apr_reset_workqueue);
 		destroy_workqueue(apr_reset_workqueue);
@@ -1127,7 +1127,7 @@ static void apr_cleanup(void)
 
 static int apr_probe(struct platform_device *pdev)
 {
-	int i, j, k;
+	int i, j, k, ret = 0;
 
 	init_waitqueue_head(&modem_wait);
 
@@ -1163,10 +1163,26 @@ static int apr_probe(struct platform_device *pdev)
 	spin_lock(&apr_priv->apr_lock);
 	apr_priv->is_initial_boot = true;
 	spin_unlock(&apr_priv->apr_lock);
-	subsys_notif_register("apr_adsp", AUDIO_NOTIFIER_ADSP_DOMAIN,
-			      &adsp_service_nb);
-	subsys_notif_register("apr_modem", AUDIO_NOTIFIER_MODEM_DOMAIN,
-			      &modem_service_nb);
+	ret = of_property_read_string(pdev->dev.of_node,
+				      "qcom,subsys-name",
+				      (const char **)(&subsys_name));
+	if (ret) {
+		pr_err("%s: missing subsys-name entry in dt node\n", __func__);
+		return -EINVAL;
+	}
+
+	if (!strcmp(subsys_name, "apr_adsp")) {
+		subsys_notif_register("apr_adsp",
+				       AUDIO_NOTIFIER_ADSP_DOMAIN,
+				       &adsp_service_nb);
+	} else if (!strcmp(subsys_name, "apr_modem")) {
+		subsys_notif_register("apr_modem",
+				       AUDIO_NOTIFIER_MODEM_DOMAIN,
+				       &modem_service_nb);
+	} else {
+		pr_err("%s: invalid subsys-name %s\n", __func__, subsys_name);
+		return -EINVAL;
+	}
 
 	apr_tal_init();
 	return apr_debug_init();